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है”ह”ह

IS 13412-2 (1998): Laminated Core Packages for Transformersand Inductors Used in Telecommunication and ElectronicEquipment, Part 2: Electrical Characteristics [LITD 5:Semiconductor and Other Electronic Components and Devices]

IS 13412( Part2): 1998

*m&m PTmzmm

Indian Standard

SPECIFICATIONFORLAMINATED COREPACKAGESFORTRANSFORMERSAND INDUCTORSUSEDINTELECOMMUNICATION

ANDELECTRONICEQUIPMENT PART 2 ELECTRICAL CHARACTERISTICS

ICS 29.180.29.040.10

BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

May 1998 Price Group 4

Magnetic Components and Ferrite Materials Sectional Committee, LTD 13

FOREWORD

This Indian Standard (Part 2) was adopted by the Bureau of Indian Standards, after the draft finalized by the Magnetic Components and Ferrite Materials Sectional Committee had been approved by the Electronics and Telecommunication Division Council.

The objective of this Indian Standard is to standardize the electrical characteristics of laminated core packages using YEE-2 laminations for cores made from specified grades of oriented silicon -steel or nickel-iron alloys.

This standard (Part 2) is largely based on IEC Pub 1021-2 (1995) ‘Laminated core packages for transformers and inductors used in telecommunication and electronic equipment : Part 2 Electrical characteristics for cores using YEE-2 laminations’, issued by the International Electrotechnical Commission (IEC).

This standard (Part 2) is one of the parts of IS 13412 series of standards on laminated core packages. The other part of the series is IS 13412 (Part 1) : 1992 ‘Specification for laminated core packages for transformers and inductors used in telecommunication and electronic equipment : Part I Dimensions’.

For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with IS 2 : 1960 ‘Rules for rounding off numerical values (revised)‘. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard.

IS13412(Part2):1998

Indian Standard

SPECIFICATION FOR LAMINATED CORE PACKAGES FOR TRANSFORMERS AND INDUCTORS USED IN TELECOMMUNICATION

AND ELECTRONIC EQUIPMENT PART 2 ELECTRICAL CHARACTERISTICS

IS No.

1885 (Part 31). 1971

9ooo(Part 1): 1998

11794 (Part 1) : 1986

1 I794 (Part 2/ Set 1) : 1986

1 SCOPE

1.1 This standard (Part 2) specifies electrical characteristics of, laminated core packages using YEB-2 laminations according to IS 11794 series and, in their larger variant, according to IS 13412 (Part l), for cores made from specified grades of oriented silicon-steel or nickel-iron alloys. It also gives the marking and packaging requirements.

1.2 The main applications of these cores exclude the signifhnt transmission of power with the consequence that the principal electrical characteristic may be expressed in terms of inductance factor, AL.

1.3 Although laminated core packages are produced with or without an air gap in the centre leg of the magnetic circuit, this standard deals only with gaped cores, where control of the length of a designed air gap enables specified AL values to be achieved.

NOTE - The electrical characteristics of laminated cotc pack- ages without an air gap is a matter of agrrcmcnt bctwcen the customer and the manufacturer.

2 REFERENCES

2.1 The Indian Standards listed below are necessary adjuncts to this standard:

Title

Electrotechnical vocabulary: Part 31 Magnetism

Basic environmental testing procedures for electronic and electrical items : Part 1 General fl~f revision)

Laminations for transformers and inductors for use in telecommun- ication and electronic equipment : Part 1 General requirements and tests

Laminations for transformers and inductors for use in telecommuni- cation and electronic equipment : Part 2 Preferred ranges of laminations, Section 1 Lamination type YEI- I

3 DEFINITIONS

3.1 General Terms

For the purpose of this standard, the following definition shall apply.

3.2 Inductance Factor, AL

The inductance of a specified coil placbd on a given core in a specified position, L, divided by the square of the number of turns, N:

AL = UN2

4 ELECTRICAL CHARACTERISTICS

4.1 The inductance factors of laminated core packages and their tolerances shall be as specified in Tables 1, 2 and 3 below for the material grades indicated, when made from the specified sheet thickness, clamped with the specified contact forces, and measured under the specified measuring conditions, using the test coils and test arrangements prescribed in 6.

5

NOTES

1 The~tiedALVJ~WillOnlykachievediftkmating surf- arc clean and cormaion frrc, and assembled in perfect alignment.

2 The specified AL values apply in the absence of @&uization. The deviations to the specified values caused by stated values of dc bias is a matter for agreement ktween the customer and the manufacturer.

OPERATING TEMPERATURE RANGE

Laminated core packages shall be suitable for storage and continuous use in the temperature range from -4O’C to + 125’C.

6 ELECTRICAL TFSTS

6.1 General Test Conditions

6.1.1 Unless otherwise specified, all tests shall be carried out at the standard atmospheric conditions for testing as recommended by IS 9OOQ (Part I).

1

Table 1 Inductance Factors with Permitted Deviations for tires Made from Oriented Silicon Steel Laminations and Clamped with the Stated Contact Force

‘. Clauses 4.1 and 3.2 )

The specified AL values are applicable to measurements made under the following conditions:

/= 3OOH.7 + 10 percent; B = 2mT 3~ 10 percent

core Contact Inductance Factor, AL NOllIiMi Designath Force nH Sheet

N F A 3 Tbickncps

* IO percent 25 40 50 63 80 100 125 160 200 250 315 400 500 630 800 loo0 1250 mm Permitted f deviations in percent

YEE 2-2dk 2.5 10 10 12.5 12.5 16 16

YEE 2-3dk 4 10 10 10 12.5 12.5 16 16

YEE 2-4dk 6.3 8 8 10 10 10 12.5 12.5 16 0.1

YJZE 2-5dk 10 8 8 8 8 8 10 10 12.5 16

WE 2-w 16 8 8 8 8 8 10 10 10 12.5 16 I.4 YEE 2-6dkL

YEE 2-8dk 25 8 8 8 8 8 10 10 10 10 12.5 16 0.1 YEE 2-8dkL

YEE 2-1Odk 40 8 8 8 8 8 8 8 10 IO 10 12.5 0.3 YEE 2-I&&

YEE 2-12dk 63 8 8 8 8 8 8 8 10 10 IO 12.5 0.35 YEE 2-12dkL

Table 2 Inductance Factors with Permitted Deviations for Cores Ma& from 72-83 Percent Nickel Iron Alloy Laminations and Clamped with the Stated Contact Force

(Clau.ws 4.1 and 6.2)

The specified AL Mlues are applicable to measurements made under the following conditions: f = 3OOHz f IO percent; B = 2mT f IO percent

core Contact Inductance Factor,&. NOdUd Designalion Force IlIi

N , A I Thii-

40 50 63 80 100 I25 160 200 250 315 400 500 630 800 I.0 1.25 1.6 2.0 2.5 3.15 4.0 5.0 DeS f IO percent Permitted f deviations in percent mm

YEE

YEE

YEE

YEE

YEE

YEE w

YEE

YEE

YEE

YEE

YEE

YEE

2-ldk

2-3dk

2-4dk

2-Sdk

2-6dk !-6dkL

2-Bdk

2-BdkL

2-lOdk

?-IMkL

2-i2dk 2-IZdkL

25 12.5 16 I6 20 20 25 25

4 12.S 12.15 I6 I6 20 20 25 25 0.1

6.3 IO 12.5 12.5 12.5 16 I6 20 20 25

10 IO IO IO 12.5 12.5 12.5 I6 16 20 20 25 0.2

I6 IO 10 10 10 12.5 12.5 12.5 16 16 I6 20 20 25

25 10 IO 10 IO IO 12.5 12.5 12.5 16 I6 16 20 25 0.1

40 IO IO IO IO IO IO IO 12.5 12.5 12.5 I6 I6 20 25 0.2

63 IO IO IO IO IO 10 IO 10 12.5 12.5 12.5 16 16 20 25 0.35

Table 3 Inductance Factors with Permitted Deviations for Cores Made from 45-50 Percent Nickel Iron Alloy laminations and Clamped with the Stated Contact Force

(Clauses 4.1 and 6.2)

The specified AL values are applicable to measurements made under the following conditions: f= 3OOHz f 10 percent; B= 2mT f 10 percent

core contact Inductance Factor, AL Nominal Designation Force JIHA Sheet

N GO 50 63 80 100 125 160 200 250 315 400 500 .630 800 1 ooo 1 250 2 m 2 52 Thick-

* 10 percent ness Permitted * deviations in percent mm

YEE 2-2dk

YEE 2-3dk

YEE 2-4dk

YEE 2-sdk

YEE 2-6dk P YEE 2-6dkL

YEE 24dk YEE 2-8dkL

YFE 2-Lodk YEJZ 2-l&w

YEE 2-12dk YEE 2-12dkL

2.5 10 12.5 12.5 16 16

4 10 10 10 12.5 12.5 16 16 20 0.1

6.3 10 10 10 12.5 12.5 16 20

10 8 8 a 10 10 12.5 16 20 0.2

16 8 8 a 10 10 10 12.5 16 20

25

40

63

8 8 8 10 10 10 Ill 12.5 16 20 0.1

8 8 8 8 10 10 10 IO 12.5 16 20 0.2

8 8 a 8 10 10 10 IO 12.5 16 20 0.35

IS 13412 ( Part 2 ) : 1998

Temperature +15V to 35% The values of U2 corresponding with the necessary test Relative humidity 45 percent to 75 percent conditions shall be as given in Table 5, together with Air pressure 860 hPa to 1060 hPa values of the parameters from AFT shall be calculated:

Test certificates shall state what test conditions have AFe=AdalIFe

been used. where

The gap surfaces of the cores under test shall be clean and free from dust, burrs, protective finish, etc. Al+ is the nominal value of the sheet area forming a

6.2 Test Procedure

The core pairs shall be put into the appropriate test coil chosen from those specified in Table 4, and loaded with the contact force applied perpendicularly to the mating faces according to Tables 1 and 3. Care shall be taken to avoid tilting of the core parts, which would lead to a change in the air gap.

The inductance L of the assembly shall be measured by means of an ac bridge in an equivalent series connection of the test coil in accordance with Fig. 1, the frequency of operation f being as specified in Tables 1 to 3, namely, 300 Hz. The peak flux density B in the core shall be adjusted to the specified value by measuring the voltage U2 at the winding N2 of the test coil, in accordance with the formula U2:

U2 = (l/&j 2 nfAFeBN2

magnetic circuit, in accordance with the dimensions given in IS 11794 series of standards.

d is the nominal value of the square stack height.

IFS is the nominal value of the effeCtbe magnetic path length, calculated as the arithmetic mean of the longest and the shortest magnetic field path length of the core neglecting radii, using the dimensions given in IS 11794 and Part 1 of this standard.

a is the stacking factor. The nominal value of a is 0.95, which takes into account actual values of 01 together with average height tolerance.

NOTE - If a dc bias is required for test purposes, this may & effected via winding NJ (see 4. Note 2).

6.3 Calculation

where The inductance factor shall ,be calculated from the

AFT is the nominal value of the effective core observed value of L.1 from the expression:

cross-section. AL = L,INf

INDUCTANCE BRIDGE DETECTOR

1 I

CORE UNDER TEST

NOTE - The voltmeter resistance shall exceed 50 K R.

FIG. 1 BASIC CIRCUIT ARRANGEMENT FOR THE DETERMINATIONOFTHEINDUCTANCEFACT~R

IS 13412 ( Part 2 ) : 1998

Table 4 Test Coil Windings Details (Clause 6.2, and Table 5)

core Number of Diameter of Desigrultion Turns’) Wire”

1. f

HI N2

(1) (2) (3)

YEE 2-2dk 316 316

YEE 2-3dk 316 316

YEE 2-4dk 316 100

YEE 2-Sdk 316 100

7

N3

(4)

-

-

loo

I00

dl mm

(5)

0.05

0.07 I

0.1

0.14

A

& mm

(6)

0.05

0.071

0.08

0.112

%

d3 mm

(7)

-

-

0.15

0.224

YEE 2-6dk 316 Ion 100

0.18 0.14 0.28

YEE 2-6dkL 0.224 0.17 0.28

YEE 2-8dk 316 100 100

0.25 0.18 0.355

YEE 2-8dkL 0.315 0.224 0.45

YEE 2-IOdk 316

0.315 100 100

0.25 0.5

YEE 2-IOdkL 0.4 0.315 0.63

YEE 2-l2dk 316 100 100

0.4 0.3 0.63

YEE 2-l2dkL 0.5 0.8 0.8

Resistance Related to 23°C (Guide

Values)

P h

1 RI R2 R3

R n n

(8) (9) (10)

43 48

25 28 -

I5 8.6 2.5

IO 5.6 1.5

7 4.5 2.0

4.5 3.1 I .25

4 .7 3.3 0.9

3 2.1 0.6

3.5 2.2 0.6

2.2 I.4 0.4

2.8 I .B 0.4

1.8 I 0.25

“Cylindrical windings NI nexest the core. N3 farthest from it.

%lues quoted um nominal conductor diameters. A suitable win for this application is Grade I solderable polyurethane enamelled round copper winding wk. class 130.

Table 5 Core Data with Test Coil Windings, Nz Voltage (Clause 6.2)

Con Designation

(1)

A d k AFC

cm2 mm cm cm2

(2) (3) (4) (5)

Measuring Voltage Uz for N2 According to Table 4 atf=

3OOHz,B=2mT mV

(6)

YEE 2-2dk 0.46

YEE 2-3dk 0.72

YEE 2-4dk I.15

YEE 2-Sdk I.84

YEE 2-6dk 2.88

YEE 2-6dkl 3.84

YEE 2-8dk 4.54

YEE 2-8dkl 5.91

YEE 2-IOdk 7.36

YE@ 2-IOdkl 9.67

YEE 2-l2dk II.52

YEE 2-IOdkl IS.36

2.4

3

3.8

4.8

6

7.6

9.6

I2

I .92

2.4

3.02

3.84

4.8

6.24

5.98

7.8

7.68

IO

9.6

12.7

0.055 4.6

0.086 7.2

0.137 3.7

0.219 5.8

0.342 9.0

0.49 14.4

0.85 22.9

I.33 35.8

6

7 MARKING AND PACKING

7.1 Cores

7.1.1 Each piece part of a laminated core package shall be marked to ensure easy identification and to enable users to assemble the two halves correctly.

7.1.2 The marking shall be legible and indelible and except for core types YEE 2-2 and YEE 2-3, shall give the following information as a minimum (see for example, Fig. 2):

a) Larger core part

1)

2) 3) 4)

Sheet thickness expressed as 100 x

nominal value in mm (for example 0.1 mm is given as 10)

Inductance factor in nH, without unit

Grade of material

Name of manufacturer or trade-mark. I), 2) and 3) are marked on one of the outer legs, 4) is marked on the other outer leg.

b) Shorter core part 1) and 3) as above on outer leg.

SHEET THICKNESS 0.1 THICKNESS IS GIVEN)

INDUCTANCE I

IS 13412 ( Part 2 ) : 1998

Example:

For core types YEE 2-2 and YEE 2-3, the cores shall, if possible, be given the manufacturer’s trade-mark and code. Any method used for marking shall be adequately explained on the corresponding packing.

7.2 Packing

7.2.1 The package shall contain all the information given on the cores, together with the number of cores and the date of manufacture. Full information shall be given for YEE 2-2 and YEE 2-3 core packages, as in 7.1.

7.2.2 Such marking shall be legible and indelible.

8 PACKAGING

8.1 Laminated core packages shall be packed in such a way that parts forming a pair cannot be confused with similar pieces of other cores.

8.2 The packaging shall provide adequate protection to the mating faces from mechanical damage and all cores shall be protected from corrosion.

mm (100 X THE NOMINAL

FACTOR AL = 1 000 nH

iii

MATERIAL GRADE El 1

10 x 1000 -El1

q c \ I

10 - El1 z \CE FOR NAME OF MANUFACTURE OR TRADE YARK

.FIG. 2 EXAMPLE OF COKE MARKING

Bureau of Indian Standards

BIS is a statutory institution established under the Bureau of Indian Starrdards Act, 1986 to promote harmonious development of the activities of standardization, marking and qualily certification of goods and attending to connected matters in the country.

Copyright

B&S has the copyright of all its publications. No part of these publications may be reproduced in any form without the prior permission in writing of BIS. This does not preclude the Cree use, in Ihe course of implementing the standard, of necessary details, such as symbols and sizes, type or grade designations. Enquiries relating to copyright be addressed to the Director (Publication), BIS.

Review of Indian Standards

Amendments are issued to standards as the need arises on the basis of comments. Standards are also reviewed periodically; a standard along with amendments is reaffirmed when such review indicates that no changes arc needed; if the review indicates that changes are needed, it is taken up for revision. Users of Indian Standards should ascertain that they are in possession of the latest amendments or edition by referring to the latest issue of ‘BIS Handbook’ and ‘Standards Monthly Additions’.

This Indian Standard has been developed from Dot: No. LTD 13 ( 1647 >.

Amendments Issued Since Publication

Amend No. Date of Issue Text Affected

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Manak Bhavan, 9 Bahadur Shah Zafar Marg, New Delhi 110002 Telephones: 323 0131,323 33 75,323 94 02

Regional Offices:

Telegrams: Manaksanslha (Common to all offices)

Telephone

‘Central : Manak Bhavan, 9 Bahadur Shah Zafar Marg NEW DELHI 110002

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32376 17,3233841

337 84 99,337 85 61 337 86 26,337 9120

1 60 38 43 60 20 25

1 235 02 16,235 04 42 2351519,2352315

{ 832 92 95,832 78 58 832 78 91,832 78 92